president obama, mitt romney and the debate in denver everyone is talking about. >>> breaking news about american airlines. why dozens of planes in the air tonight are being grounded when they land. >>> out of gas. why some gas stations are shutting down in a place where prices are already over $5 a gallon. >>> is it a hidden danger of chemicals, a high importance to mothers and their newborns. >>> and bird's eye view. what we look like to them. "nightly news" begins now. >>> good evening. they now estimate over 67 million of us watched the debate in denver last night and what people saw was a highly energized, motivated and combative mitt romney sharing the stage with a subdued and lackluster president obama. what they saw was mitt romney on his way over the course of 90 minutes to scoring a clear and consensus victory in what will be the first of three meetings. for romney, today felt like a new chapter. here's a look at the crowd waiting for him tonight in virginia. while the president today said some things he was expected to say on the stanl last night. we begin our coverage with an